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Funny enough. I have been using A PC PSU @12V (for years just fine) but have now converted another PSU to run @14V DC (although I can go up to @18V DC for my mount, 14~16V is enough)
Just had to find the controller IC PWM feedback network divider pin and replace it with a pot. Also replace overvoltage zeners @3.3V line @5V line (had no zeners on 12V line!) with 18V one (on 12V line, only interested in this line as this is the Vrail I am upping)...oh and replaced caps with higher rated ones on the appropriate places.
I have it running now.
I have a new metal case for it and was going add some more output filtering via capacitors and high capacity ferrite choke. This part is still in work atm. but PC PSUs are very useful for these applications.
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